Support arithmetic on pointer-to-function types as a GNU

extension. Addresses clang PR/3371.

llvm-svn: 62823

1 files changed, 7 insertions, 2 deletions

diff --git a/clang/test/Sema/pointer-addition.c b/clang/test/Sema/pointer-addition.c
index 95f364fc676..81a1dc06c1f 100644
--- a/clang/test/Sema/pointer-addition.c
+++ b/clang/test/Sema/pointer-addition.c
@@ -2,13 +2,18 @@
 
 typedef struct S S; // expected-note{{forward declaration of 'struct S'}}
 void a(S* b, void* c) {
+  void (*fp)(int) = 0;
   b++;       // expected-error {{arithmetic on pointer to incomplete type}}
   b += 1;    // expected-error {{arithmetic on pointer to incomplete type}}
   c++;       // expected-warning {{use of GNU void* extension}}
   c += 1;    // expected-warning {{use of GNU void* extension}}
+  c--;       // expected-warning {{use of GNU void* extension}}
+  c -= 1;    // expected-warning {{use of GNU void* extension}}
   b = 1+b;   // expected-error {{arithmetic on pointer to incomplete type}}
   /* The next couple tests are only pedantic warnings in gcc */
   void (*d)(S*,void*) = a;
-  d += 1;    // expected-error {{arithmetic on pointer to function type}}}
-  d++;       // expected-error {{arithmetic on pointer to function type}}}
+  d += 1;    // expected-warning {{arithmetic on pointer to function type 'void (*)(S *, void *)' is a GNU extension}}
+  d++;       // expected-warning {{arithmetic on pointer to function type 'void (*)(S *, void *)' is a GNU extension}}}
+  d--;       // expected-warning {{arithmetic on pointer to function type 'void (*)(S *, void *)' is a GNU extension}}
+  d -= 1;    // expected-warning {{arithmetic on pointer to function type 'void (*)(S *, void *)' is a GNU extension}}
 }